On the US-Mexico border, loved ones on both sides can see each other but cannot touch

‘How many years has it been since we have seen each other?’

At Friendship Park, the westernmost point of the US-Mexico border, just south of San Diego, US Border Patrol agents help to facilitate and monitor weekend reunions between families separated by the massive barrier – and, by extension, by US immigration policies. Mexicans and Americans have met in the area since the Mexican-American War ended in 1848, and the border was redrawn, significantly favouring the US. Friends and families were able to touch one another through the fence before metallic mesh was added in 2011 for security. With quiet compassion, Monument | Monumento captures several of these unconventional and frequently tearful family reunions, some of which have been decades in the making.

Meet the British bouncer in LA on an expired visa who has no time for immigrants

Steve is a former weightlifter who still keeps up with quite a few hobbies: fitness, heavy metal music, clay sculpture, bikes, motorcycles, and lots and lots of weapons. He works as a bouncer outside a Los Angeles nightclub, making small talk with the (often over-served) young patrons, and throwing out troublemakers. And, as he’ll tell anyone who’ll listen, he hates what immigration is doing to the country – despite being a Brit who’s overstayed his own US visa by 25 years. Steve Is Undocumented captures him at a moment of transition, preparing for a move back to England with his wife, who is pregnant with twins. With their stylish and often wry profile, the directors Michael Barth and Kauai Moliterno build a complex portrait in just 10 minutes, capturing the many intricacies and blaring hypocrisies of Steve’s life and worldview.

After losing his sight, a skateboarder takes an unexpected path to realising his dreams

Nick Mullins fell in love with skateboarding as a teenager and, rather quickly, became quite skilled. As one of the best young skateboarders in the Detroit area, he was putting together a video to catch the attention of sponsors, when, after taking a rough but mostly innocuous fall, he scraped the side of his body and contracted a staph infection. He would barely escape with his life, and after waking up from a medically induced coma, realised he had gone blind. Believing he had no prospects – in skating or in life – he fell into a deep depression. The short documentary You and the Thing That You Love retells how Mullins would eventually realise his dreams, albeit by taking a very much unanticipated path. Capturing Mullins’s story with kinetic style, the US filmmaker Nicholas Maher avoids cliché to create a standout portrait of perseverance and love of craft – and one that can be savoured even if you don’t know your ‘blunts’ from your ‘fakies’.

Algorithms are sensitive. People are specific. We should exploit their respective strengths

The capabilities of algorithms and human brainpower overlap, intersect and contrast in a multitude of ways, argues Hannah Fry, an associate professor in the mathematics of cities at University College London, in this lecture at the Royal Institution from 2018. And, says Fry, planning for an efficient, ethical future demands that we carefully consider the respective strengths of each without stereotyping either as inherently good or bad, while always keeping their real-world consequences in mind. Borrowing from her book Hello World: Being Human in the Age of Algorithms (2018), Fry’s presentation synthesises fascinating studies, entertaining anecdotes and her own personal experiences to build a compelling argument for how we ought to think about algorithms if we’d like them to amplify – and not erode – our humanity.

New York’s 300-year-old trash becomes treasure in the hands of an urban archaeologist

Scott Jordan’s two-bedroom apartment in Queens, New York is filled with thousands of local artefacts, many of which date back centuries. Populating his shelves and drawers are glass bottles, porcelain dolls, pottery and even a gun from the Revolutionary War – all of them once buried far beneath New Yorkers’ feet, and many of which he’s repurposed to create original art. This small museum of recovered treasures comes from years of playing in the dirt and digging out landfills, cisterns and privies by hand. In The Artefact Artist, the US director Russ Kendall explores the buried history of cities, and how Jordan finds meaning and community in the process of searching for, discovering, and transforming objects others have left for trash.